A cyclic amine derivative represented by the following formula: wherein R1 represents a substituted or unsubstituted phenyl group, R2 represents a substituted of unsubstituted C1-C8 aliphatic acyl group, a substituted or unsubstituted benzoyl group or a C1-C4 alkoxycarbonyl group, and R3 represents a substituted 3 to 7 membered saturated cyclic amino group which may form a fused ring; or pharmaceutically acceptable salts thereof. The compounds and salts have excellent platelet aggregation inhibitory action. They are useful for the treatment and prevention of such diseases as embolism, thrombosis or arteriosclerosis and for the preparation of pharmaceutical compositions for such uses.
